文档介绍：环境保护从我们大家做起 Environmental protection from all of us started
——李克平
2013441272
测控2013-01
据调查显示
According to the survey
大气污染
Air pollution
环境污染一角 Environment pollution corner
工业污染INDUSTRIAL POLLUTION
水污染 Water pollutant
水污染的现状
The present situation of water pollution
从全国总体情况看,废水排放量增长速度极快。城市生活污水总量也不断增加,2000年约达到783亿吨。由于废水处理事低(估计仅为20%~30%),大部分废水未经处理直接或间接排入水体,严重污染了水资源。我国七大水系中近一半河段污染严重,86%的城市河段水质普遍超标。全国被污染水系,比较严重的是淮河、海河、松花江、辽河、长江中下游以及珠江三角洲等工业比较发达地区。河流的城市段污染明显,小河重于大河,北方重于南方。1990年,在被评价的94个河流城市段中,65个受到不同程度的污染,%,污染物主要以氨氮、挥发酚和耗氧有机物为主。据调查,全国有7亿人饮用大肠杆菌超标水,,3500万人饮用***盐超标水。
From the general situation look, wastewater emissions growth very fast. City life total sewage are also increasing, about 2000 to billion tons. Due to the low wastewater treatment things (estimates only 20% ~ 30%), most of the waste water treatment without directly or indirectly into the water, causing serious pollution of water resources. Seven of the great river in nearly half of river pollution is serious, 86% of urban river water mon to exceed bid. The polluted water system, more serious is the huai river, hai river, the songhua river, liao river, the Yangtze river and the pearl river delta and other industrial more developed regions. The river city period of pollution obvious, on the river to the river, and the north on the south. In 1990, in 94 by evaluation river city paragraph, 65 by different levels of pollution, accounting for %, the main pollutants in ammonia nitrogen and oxygen consumption of volatile phenol anic matter give priority to. According to the survey, the 700 million people who drink escherichia coli overweight water, 164 million people who anic pollution of the water, and 35 million people drinking water nitrate exceeds bid.
Water pollution